[gtk+] Fix some compilation warning

[Javier Jardón <jjardon src gnome org>]

commit 13ff5575872c89abb12b8b7620bfd3745aaf53a5
Author: Javier Jardón <jjardon gnome org>
Date:   Wed Oct 21 02:37:05 2009 +0200

    Fix some compilation warning
    
    Complete the previous patch: set lower to 0 too

 gtk/gtkmenu.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkmenu.c b/gtk/gtkmenu.c
index 9d3107b..0bdf1de 100644
--- a/gtk/gtkmenu.c
+++ b/gtk/gtkmenu.c
@@ -2734,6 +2734,7 @@ get_arrows_visible_area (GtkMenu      *menu,
     default:
        g_assert_not_reached();
        upper->x = upper->y = upper->width = upper->height = 0;
+       lower->x = lower->y = lower->width = lower->height = 0;
     }
 
   *arrow_space = scroll_arrow_height - 2 * widget->style->ythickness;